Lee's Summit, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Lee's Summit is known for the Missouri Town 1855 living history museum and Longview Lake. The best time to travel to Lee's Summit, United States, is in late spring (May), when the average air temperature is around 70°F (21°C) and the average water temperature in nearby lakes is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!